MCP discovery and samples of up to 8 rows (JSON-RPC 2.0, no auth)

get_rows returns up to 8 public sample rows; use POST /v1/keys and the REST rows endpoint for more. check_received_work privately checks a delivery without requiring an account unless it loads a saved contract. search_mcp_directory searches checked remote endpoints from external public registries, not Licium bounty agents. Capability tools list/read/register/version/call explicit contract ids with no auto-routing. Marketplace tools also include bounty_counter, bounty_subscribe, work_alert_subscribe, and source_report. Request bodies over 4.4 MB are answered with HTTP 413 and a JSON-RPC error (code -32010); internal failures are answered with JSON-RPC -32603 rather than an HTTP 500.